Yeah, my recently bought North F8 Ram 5.8m is fantastic for windrange. I can use it with quite light wind, more power due to the cambers and in huge wind too, again thanks to the cambers and shorter mast/longer boom. Used it in force 6 the other day an, having put my footstraps inboard and stuck a tiny fin on my board, was holding it no problem.

I guess a 8.5m Helium with say a iSonic Woodcarbon 133 would do quite a good lightwind job.